Problem building the atomic gem

[slanand]

I'm getting this error message when trying to get the atomic gem -- looks like it might be a problem with GCC (which was part of the last pull request). Any ideas how to fix this?

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb

checking for libkern/OSAtomic.h... yes
creating Makefile

make "DESTDIR="
compiling atomic_reference.c
atomic_reference.c:57:59: warning: incompatible pointer types passing 'void *' to parameter of type 'volatile int64_t *' (aka 'volatile long long *') [-Wincompatible-pointer-types]
if (OSAtomicCompareAndSwap64(expect_value, new_value, &DATA_PTR(self))) {
^~~~~~~~~~~~~~~
/usr/include/libkern/OSAtomic.h:507:93: note: passing argument to parameter '__theValue' here
bool OSAtomicCompareAndSwap64( int64_t __oldValue, int64_t __newValue, volatile int64_t *__theValue );
^
1 warning generated.
linking shared-object atomic_reference.bundle
clang: error: unknown argument: '-multiply_definedsuppress' [-Wunused-command-line-argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
make: ** [atomic_reference.bundle] Error 1

[chdiza]

I get this too; it's the fault of the latest clang that comes with Xcode 5.1.

But I have no idea what to do about it.

[headius]

I have an xcode 5.1 update in process...will try to reproduce on my end once that happens.

[slanand]

Thank you!

[Iteratix]

+1 for this, unable to build on latest Mavericks with latest Xcode.

[richardcalahan]

This is a red flag:

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb

When you run bundle install bundler is using your system ruby to create the makefile for atomic, which is most likely very old. I use rbenv to manage my rubies, so the following corrected the issue for me:

# ensure correct ruby is set
$ rbenv global 2.1.1 
$ gem install bundler
$ rbenv rehash
$ bundle install

Now bunder uses the correct gem binary, which doesn't pass unknown arguments to clang.

[chdiza]

@richardcalahan I didn't run bundle install (it was gem install), and the system ruby on OSX 10.9.2 is not "very old" (2.0.0).

Also, I got this error wtih system ruby and with 2.1.

[richardcalahan]

Here's a comparison of the output from gem env. The first using the system ruby, which yielded the error, and the second with Ruby 2.1.1, which works fine for me. Using bundler and gem install.

Clang Error

- RUBYGEMS VERSION: 2.0.3
- RUBY VERSION: 2.0.0 (2013-06-27 patchlevel 247) [universal.x86_64-darwin13]
- INSTALLATION DIRECTORY: /Library/Ruby/Gems/2.0.0
- RUBY EXECUTABLE: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby
- EXECUTABLE DIRECTORY: /usr/bin
- RUBYGEMS PLATFORMS:
  - ruby
  - universal-darwin-13
- GEM PATHS:
   - /Library/Ruby/Gems/2.0.0
   - /Users/richardcalahan/.gem/ruby/2.0.0
   - /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/gems/2.0.0
- GEM CONFIGURATION:
   - :update_sources => true
   - :verbose => true
   - :backtrace => false
   - :bulk_threshold => 1000
- REMOTE SOURCES:
   - https://rubygems.org/

No Clang Error

- RUBYGEMS VERSION: 2.2.2
- RUBY VERSION: 2.1.1 (2014-02-24 patchlevel 76) [x86_64-darwin13.0]
- INSTALLATION DIRECTORY: /Users/richardcalahan/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0
- RUBY EXECUTABLE: /Users/richardcalahan/.rbenv/versions/2.1.1/bin/ruby
- EXECUTABLE DIRECTORY: /Users/richardcalahan/.rbenv/versions/2.1.1/bin
- SPEC CACHE DIRECTORY: /Users/richardcalahan/.gem/specs
- RUBYGEMS PLATFORMS:
  - ruby
  - x86_64-darwin-13
- GEM PATHS:
   - /Users/richardcalahan/.rbenv/versions/2.1.1/lib/ruby/gems/2.1.0
   - /Users/richardcalahan/.gem/ruby/2.1.0
- GEM CONFIGURATION:
   - :update_sources => true
   - :verbose => true
   - :backtrace => false
   - :bulk_threshold => 1000
- REMOTE SOURCES:
   - https://rubygems.org/
- SHELL PATH:
   - /Users/richardcalahan/.rbenv/versions/2.1.1/bin
   - /usr/local/Cellar/rbenv/0.4.0/libexec
   - /Users/richardcalahan/.rbenv/shims
   - /usr/local/sbin
   - /usr/local/bin
   - /usr/bin
   - /bin
   - /usr/sbin
   - /sbin
   - /usr/local/bin
   - /opt/X11/bin

[richardcalahan]

Also, using the system ruby, the error was originating from: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/universal-darwin13/rbconfig.rb

Removing the references to the clang flag multiply_definedsuppress on lines 82 and 125 fixed the issue as well.

No, it might not be very old, but ruby 2.0.x does use deprecated flags.

[dpehrson]

The solution offered by @richardcalahan is the only one that actually worked for me.

[Iteratix]

+1 for the solution by @richardcalahan. Odd though when I use bundler, it uses system Ruby to compile vs the one I compiled in ~/.rubies. I'm using chruby.